Portivo Hawkeyes Distance Swim Goggles with Reflex Mirror and Anti-Fog Coating Panoramic lenses maximize peripheral vision for full field view and 'spotting' competition. Reflex gold lenses enhance contrasts, improving visual perception, and minimize glare, providing maximum clarity. Slim profile eliminates peripheral distortion / tunnel vision typical of racing goggles. Fluid contour design minimizes drag and provides proper lens depth avoiding claustrophobic sensation. Ergonomic frame and gasket design eliminates uncomfortable 'digging' into eye sockets.